diff options
Diffstat (limited to 'src/mame/drivers/c80.c')
-rw-r--r-- | src/mame/drivers/c80.c | 293 |
1 files changed, 293 insertions, 0 deletions
diff --git a/src/mame/drivers/c80.c b/src/mame/drivers/c80.c new file mode 100644 index 00000000000..4af7ab0c6db --- /dev/null +++ b/src/mame/drivers/c80.c @@ -0,0 +1,293 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/*************************************************************************** + +C-80 + +Pasting: + 0-F : as is + + (inc) : ^ + - (dec) : V + M : - + GO : X + +Test Paste: + -800^11^22^33^44^55^66^77^88^99^-800 + Now press up-arrow to confirm the data has been entered. + +Commands: + R : REGister + M : MEMory manipulation + G : GO + F10 : RESet + ESC : BRK + +Functions (press F1 then the indicated number): + 0 : FILL + 1 : SAVE + 2 : LOAD + 3 : LOADP + 4 : MOVE + 5 : IN + 6 : OUT + +When REG is chosen, use UP to scroll through the list of regs, +or press 0 thru C to choose one directly: + 0 : SP + 1 : PC + 2 : AF + 3 : BC + 4 : DE + 5 : HL + 6 : AF' + 7 : BC' + 8 : DE' + 9 : HL' + A : IFF + B : IX + C : IY + +When MEM is chosen, enter the address, press UP, enter data, press UP, enter +data of next byte, and so on. + +****************************************************************************/ + +#include "includes/c80.h" +#include "sound/wave.h" +#include "c80.lh" + +/* Memory Maps */ + +static ADDRESS_MAP_START( c80_mem, AS_PROGRAM, 8, c80_state ) + ADDRESS_MAP_UNMAP_HIGH + AM_RANGE(0x0000, 0x07ff) AM_ROM + AM_RANGE(0x0800, 0x0bff) AM_MIRROR(0x400) AM_RAM +ADDRESS_MAP_END + +static ADDRESS_MAP_START( c80_io, AS_IO, 8, c80_state ) + ADDRESS_MAP_GLOBAL_MASK(0xff) + AM_RANGE(0x7c, 0x7f) AM_DEVREADWRITE(Z80PIO2_TAG, z80pio_device, read, write) + AM_RANGE(0xbc, 0xbf) AM_DEVREADWRITE(Z80PIO1_TAG, z80pio_device, read, write) +ADDRESS_MAP_END + +/* Input Ports */ + +INPUT_CHANGED_MEMBER( c80_state::trigger_reset ) +{ + m_maincpu->set_input_line(INPUT_LINE_RESET, newval ? CLEAR_LINE : ASSERT_LINE); +} + +INPUT_CHANGED_MEMBER( c80_state::trigger_nmi ) +{ + m_maincpu->set_input_line(INPUT_LINE_NMI, newval ? CLEAR_LINE : ASSERT_LINE); +} + +static INPUT_PORTS_START( c80 ) + PORT_START("ROW0") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("REG") PORT_CODE(KEYCODE_R) PORT_CHAR('R') + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("GO") PORT_CODE(KEYCODE_G) PORT_CODE(KEYCODE_X) PORT_CHAR('X') + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_D) PORT_CHAR('D') + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_A) PORT_CHAR('A') + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7') + PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4') + PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1') + PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("FCN") PORT_CODE(KEYCODE_F1) + + PORT_START("ROW1") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("+") PORT_CODE(KEYCODE_UP) PORT_CHAR('^') + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("-") PORT_CODE(KEYCODE_DOWN) PORT_CHAR('V') + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_E) PORT_CHAR('E') + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_B) PORT_CHAR('B') + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8') + PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5') + PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2') + PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0') + + PORT_START("ROW2") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNUSED ) + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNUSED ) + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F) PORT_CHAR('F') + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_C) PORT_CHAR('C') + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9') + PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6') + PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3') + PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("MEM") PORT_CODE(KEYCODE_M) PORT_CHAR('-') + + PORT_START("SPECIAL") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("RES") PORT_CODE(KEYCODE_F10) PORT_CHANGED_MEMBER(DEVICE_SELF, c80_state, trigger_reset, 0) + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("BRK") PORT_CODE(KEYCODE_ESC) PORT_CHANGED_MEMBER(DEVICE_SELF, c80_state, trigger_nmi, 0) +INPUT_PORTS_END + +/* Z80-PIO Interface */ + +READ8_MEMBER( c80_state::pio1_pa_r ) +{ + /* + + bit description + + PA0 keyboard row 0 input + PA1 keyboard row 1 input + PA2 keyboard row 2 input + PA3 + PA4 _BSTB input + PA5 display enable output (0=enabled, 1=disabled) + PA6 tape output + PA7 tape input + + */ + + UINT8 data = !m_pio1_brdy << 4 | 0x07; + + int i; + + for (i = 0; i < 8; i++) + { + if (!BIT(m_keylatch, i)) + { + if (!BIT(m_row0->read(), i)) data &= ~0x01; + if (!BIT(m_row1->read(), i)) data &= ~0x02; + if (!BIT(m_row2->read(), i)) data &= ~0x04; + } + } + + data |= (m_cassette->input() < +0.0) << 7; + + return data; +} + +WRITE8_MEMBER( c80_state::pio1_pa_w ) +{ + /* + + bit description + + PA0 keyboard row 0 input + PA1 keyboard row 1 input + PA2 keyboard row 2 input + PA3 + PA4 _BSTB input + PA5 display enable output (0=enabled, 1=disabled) + PA6 tape output + PA7 tape input + + */ + + m_pio1_a5 = BIT(data, 5); + + if (!BIT(data, 5)) + { + m_digit = 0; + } + + m_cassette->output(BIT(data, 6) ? +1.0 : -1.0); +} + +WRITE8_MEMBER( c80_state::pio1_pb_w ) +{ + /* + + bit description + + PB0 VQD30 segment A + PB1 VQD30 segment B + PB2 VQD30 segment C + PB3 VQD30 segment D + PB4 VQD30 segment E + PB5 VQD30 segment F + PB6 VQD30 segment G + PB7 VQD30 segment P + + */ + + if (!m_pio1_a5) + { + output_set_digit_value(m_digit, data); + } + + m_keylatch = data; +} + +WRITE_LINE_MEMBER( c80_state::pio1_brdy_w ) +{ + m_pio1_brdy = state; + + if (state) + { + if (!m_pio1_a5) + { + m_digit++; + } + + m_pio1->strobe_b(1); + m_pio1->strobe_b(0); + } +} + +/* Z80 Daisy Chain */ + +static const z80_daisy_config c80_daisy_chain[] = +{ + { Z80PIO1_TAG }, + { Z80PIO2_TAG }, + { NULL } +}; + +/* Machine Initialization */ + +void c80_state::machine_start() +{ + /* register for state saving */ + save_item(NAME(m_keylatch)); + save_item(NAME(m_digit)); + save_item(NAME(m_pio1_a5)); + save_item(NAME(m_pio1_brdy)); +} + +/* Machine Driver */ + +static MACHINE_CONFIG_START( c80, c80_state ) + /* basic machine hardware */ + MCFG_CPU_ADD(Z80_TAG, Z80, 2500000) /* U880D */ + MCFG_CPU_PROGRAM_MAP(c80_mem) + MCFG_CPU_IO_MAP(c80_io) + MCFG_CPU_CONFIG(c80_daisy_chain) + + /* video hardware */ + MCFG_DEFAULT_LAYOUT( layout_c80 ) + + /* devices */ + MCFG_DEVICE_ADD(Z80PIO1_TAG, Z80PIO, 2500000) + MCFG_Z80PIO_OUT_INT_CB(INPUTLINE(Z80_TAG, INPUT_LINE_IRQ0)) + MCFG_Z80PIO_IN_PA_CB(READ8(c80_state, pio1_pa_r)) + MCFG_Z80PIO_OUT_PA_CB(WRITE8(c80_state, pio1_pa_w)) + MCFG_Z80PIO_OUT_PB_CB(WRITE8(c80_state, pio1_pb_w)) + MCFG_Z80PIO_OUT_BRDY_CB(WRITELINE(c80_state, pio1_brdy_w)) + + MCFG_DEVICE_ADD(Z80PIO2_TAG, Z80PIO, 2500000) + MCFG_Z80PIO_OUT_INT_CB(INPUTLINE(Z80_TAG, INPUT_LINE_IRQ0)) + + MCFG_CASSETTE_ADD("cassette") + MCFG_CASSETTE_DEFAULT_STATE(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED ) + + MCFG_SPEAKER_STANDARD_MONO("mono") + MCFG_SOUND_WAVE_ADD(WAVE_TAG, "cassette") + MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25) + + /* internal ram */ + MCFG_RAM_ADD(RAM_TAG) + MCFG_RAM_DEFAULT_SIZE("1K") +MACHINE_CONFIG_END + +/* ROMs */ + +ROM_START( c80 ) + ROM_REGION( 0x10000, Z80_TAG, 0 ) + ROM_LOAD( "c80.d3", 0x0000, 0x0400, CRC(ad2b3296) SHA1(14f72cb73a4068b7a5d763cc0e254639c251ce2e) ) +ROM_END + + +/* System Drivers */ + +/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ +COMP( 1986, c80, 0, 0, c80, c80, driver_device, 0, "Joachim Czepa", "C-80", MACHINE_SUPPORTS_SAVE ) |